202130989 has 4 divisors (see below), whose sum is σ = 202224220. Its totient is φ = 202037760.

The previous prime is 202130983. The next prime is 202130993. The reversal of 202130989 is 989031202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91355364 + 110775625 = 9558^2 + 10525^2 .

It is a cyclic number.

It is not a de Polignac number, because 202130989 - 2⁹ = 202130477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43284 + ... + 47725.

It is an arithmetic number, because the mean of its divisors is an integer number (50556055).

Almost surely, 2^202130989 is an apocalyptic number.

It is an amenable number.

202130989 is a deficient number, since it is larger than the sum of its proper divisors (93231).

202130989 is an equidigital number, since it uses as much as digits as its factorization.

202130989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93230.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 202130989 is about 14217.2778336783. The cubic root of 202130989 is about 586.8732307143.

The spelling of 202130989 in words is "two hundred two million, one hundred thirty thousand, nine hundred eighty-nine".